Our Expense management App build over PowerApps platform is most suitable of Startups and small business. Expense management App comes free for Office 365 customers.
Google Play App StorePowerApps license is free for many Office 365 plans , XpenseCo have designed Travel and Expense claim app on this same platform. This app allows business users to create travel request , claim expense directly from the mobile .
This also allow users to approve/reject the request and claim from the mobile app itself. Users can attach receipts directly from the mobile app.